[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA] CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW TIRES ON ALL 4 WHEELS FROM 3.6 MI WEST OF DEW DROP (AMADOR CO) TO 1 MI WEST OF WOODFORDS (ALPINE CO) IS REOPENED FROM 3.5 MI EAST OF SILVER LAKE TO KIRKWOOD (AMADOR CO) /CARSON SPUR/ AT 0451 HRS ON 12/22/12